This movement is enough string. The trip frame is a ring of metal to which are versing friction system, the drum rotating with the to close the main circuit and thus release the sema- pivotally connected a series of trip arms, whose free engine shaft when hoisting and on the shaft when phore, which… … UNTERBRINK'S HAY SLING. face 68^ feet. Ratio, 42'1 to 1. The circular shell is % inch thick, the outer firebox -f^ inch, and the the auxiliary or locking circuit is closed, the magnet bar pivoted in the frame a little to one side of its cen- inner firebox % inch thick. Tube sheet 3^ inch attracts…
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